Bimetal Al–Ni nano-powders for energetic formulations

Bimetal Al–Ni nano-powders for energetic formulations

Bibliographic Details
Parent link:Combustion and Flame
Vol. 173.— 2016.— [P. 179-186]
Corporate Author: Национальный исследовательский Томский политехнический университет Институт физики высоких технологий Кафедра физики высоких технологий в машиностроении
Other Authors: Abraham A. Ani, Nie H. Hongqi, Schoenitz M. Mirko, Vorozhtsov A. B. Aleksandr Borisovich, Lerner M. I. Marat Izrailyevich, Pervikov A. V. Alexander Vasilyevich, Rodkevich N. G. Nikolay Grigorjevich, Dreizin E. L. Edward L.
Summary:Title screen
Four bimetal Al–Ni nano-powders with compositions varied from 5 to 45 at% of nickel were synthesized by explosion of electrically heated twisted pure Al and Ni wires in argon. The nano-powders were characterized using electron microscopy, x-ray diffraction, and thermal analysis. Materials were ignited using an electrically heated filament coated with powder and electrostatic discharge (ESD). The results were compared to those for pure nano-aluminum powder (n-Al) prepared using the same wire explosion technique. The nano-powders with high nickel concentrations contain fully reacted intermetallic phases, which are difficult to oxidize making them unattractive for energetic formulations. Nano-powders with lower nickel concentrations do not contain significant amounts of the intermetallic phases. No intermetallics were detected in the powder with 5 at% Ni, which oxidized qualitatively similar to n-Al. The overall mass gain during oxidation for the bimetal powder was nearly identical to that of n-Al, suggesting the same heat release anticipated from their combustion. Oxidation kinetics assessed for this material accounting directly for the measured particle size distribution was compared to that of n-Al. The bimetal powder oxidized slower than n-Al, indicating its greater stability during handling and storage. The bimetal powder was less ESD-ignition sensitive than n-Al, but generated a stronger emission signal when ignited. Therefore, the bimetal powder with 5 at% Ni is an attractive replacement of n-Al for advanced energetics with lower ESD sensitivity, better stability, and improved combustion performance.
Режим доступа: по договору с организацией-держателем ресурса
Published: 2016
Subjects:
электронный ресурс
труды учёных ТПУ
наноалюминий
чувствительность
зажигание
старение
термический анализ
электростатические разряды
Online Access:http://dx.doi.org/10.1016/j.combustflame.2016.08.015
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=650529

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